help with jetting!porting and pipes by trinity, b

[snowfoxsx]

my shee has porting by trinity, stock carbs, trinity pipes stage 4 pipes, 12/41 gearing, 340 main jets, stock pilets, stock needles, 150 comp. .060 bore, boysen reeds. temps around 75 degrees and 900 elevation.

 

it starts first kick hot or cold, idles fine, bottom end is a little rough till powerband hits but seems to run and pull hard, no missing or backfire when i nail it. just in the upper reves it seems to spit and fart/backfire, i did a search and came up with it is too lean on the mains, does this sound right? this is my first shee so it is a learing time! i pulled out the choke in the upper reves and it seems to stop backfiring and the power drops off so let me know

 

help a fellow rider out

 

and loboboy, i lost your jetting specs you gave me for your pipes, so can i get them again? i think you said a 360 main?

 

thanks

[bansheeseat$$]

Defanetly sounds like your to lean,The reason you lost some power is because the choke circuit is way to rich to run properly.

[snowfoxsx]

ok, thats what i thought, any idea how big i should jump up the mains?

[fastbanshee4u]

call Trinity.

[snowfoxsx]

jeez, you guys are a lotta help! i would figure someone on here has run a setup like this and would be able to help!!!!

[00tbanshee]

jeez, you guys are a lotta help! i would figure someone on here has run a setup like this and would be able to help!!!! 

504394[/snapback]

i would jump up to a 360 main and do a plug check at wide open throttle

[odaen]

does it pop and such in every gear, or just 5th and 6th? if it does it in every gear, bump your mains up 2 sizes, if it's only in 5th and 6th, bump it up 1

[snowfoxsx]

thanks guys, that is what i was looking for as an answer!! it pops in 5th a bit and 6th, so 1 jet size up, 350?

 

thanks!